Check the listing for details. Zinc Plated Carbon Steel Flat Head 5/16" 18UNC Rivnut Threaded Insert Socket 100. Condition: New. Listed at 14.49 USD. More product informationRivet Nut Size:In this set, it include 100pcs 5/16"-18UNC rivet nuts for your work, which drill hole size is 10.8mm/0.43'', total length is 18.5mm/0.72''.Feature:Head Type: Flat Head; Color: Yellow. Nuts have a work-hardened surface providing high-strength, load-bearing threads.Durable Quality: All the rivet nut are made of carbon steel, with zinc plated on the surface, strong and durable, you will no longer worry about them rusting and breaking when installing.Multipurpose: It can be used for fixing in many different kinds of material including steel, fiberglass and plastic, etc. Application: Perfect for automotive, furniture, decoration and other electrical and industrial products.Glarks 100pcs carbon steel flat head threaded rivetnut insert nutsert rivet nut set Specification:Head Type: Flat HeadColor: YellowMaterial: Zinc Plated Carbon SteelRivet Nut Size: 5/16"-18UNC About our rivet nut:These rivet nuts are suitable for a variety of thickness of the material including steel, fiberglass and plastic, etc, riveting firm with high efficiency, easy to use. Application: Perfect for automotive, furniture, decoration and other electrical and industrial products Package Details::Thread ------------ Drill Hole Size -------- Quantity5/16"-18UNC ----------- 0.43'' ------------- 100pcs Note:Please check the specific size of the product according to the second picture. Due to manual measurement, there may be errors, please don't mind. Free Shipping Return window is 30 day after receiving the item